HI-REV™ MANGANESE BRONZE TYPE I – 4 RACING VALVE GUIDES – 4-PIECE SET

Manganese Bronze is Self Lubricating with Hard Wear Pads for Extended Life

Short guide boss for added clearance to eliminate retainer to guide interference on high-lift camshafts

Protect against premature valve guide failures and costly repairs caused by high operating temperatures, lean fuel mixtures, fuel contaminates, retarded ignition settings and lack of valve guide lubrication due to use of low and no lead gasoline